发明名称 |
MAGNETIC PIGMENTS AND PROCESS OF ENHANCING MAGNETIC PROPERTIES |
摘要 |
A pearlescent pigment and a process for enhancing the magnetic properties of a pearlescent pigment. The pearlescent pigment has a layer with regions of γ-Fe2O3 and regions of α-Fe2O3. The magnetic properties of a pearlescent pigment may be enhanced by the steps of: providing a platelet pigment with a layer of Fe2O3, with a magnetic susceptibility less than 0.1×10−5 m3/kg; reducing some or all of the Fe2O3 to Fe3O4; and oxidizing some or all of the Fe3O4 to γ-Fe2O3. The color difference (&Dgr;E*) between the provided pigment and the resultant pigment is not more than about 5. |
申请公布号 |
EP2285910(A1) |
申请公布日期 |
2011.02.23 |
申请号 |
EP20090731114 |
申请日期 |
2009.03.25 |
申请人 |
SUN CHEMICAL CORPORATION |
发明人 |
HOLLMAN, AARON, M.;SCHOTTLAND, PHILIPPE |
分类号 |
C09C1/00;C09C3/06 |
主分类号 |
C09C1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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